4.10 or 3.73 gears on 05 GT automatic?
#1
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Well the title says it all.
Should I get 4.10 or 3.73 ring & pinions installed in my 05 GT automatic ?
The 05 GT automatic comes stock with 3.31 gears (manual is 3.55?).
Some people say that 4.10 is too much for the 05 GT automatic.
I can also get 3.90 (non Ford) gears - Ford does not appear to make 3.90 gears (for Mustangs). I don't trust non Ford gears.
I'm really interested in hearing from people who have installed gears in their automatic 05s.
Should I get 4.10 or 3.73 ring & pinions installed in my 05 GT automatic ?
The 05 GT automatic comes stock with 3.31 gears (manual is 3.55?).
Some people say that 4.10 is too much for the 05 GT automatic.
I can also get 3.90 (non Ford) gears - Ford does not appear to make 3.90 gears (for Mustangs). I don't trust non Ford gears.
I'm really interested in hearing from people who have installed gears in their automatic 05s.
#4
ok, so Motive has a 3.90 ratio?..I have been deciding between the 3.90 an 4.10 for my manual..Not to hijack the thread, but maybe somebody could give me some insight and recommendation. I drive on the hwy 40 mi each way to work and would like to keep somewhat in the same mileage range that the car provides now..Do you think the 3.90's would be a better choice in terms of mileage or would it not even be noticeable over the 4.10's?
#7
4.10s are way more gear than you need with an automatic.
Everyone seems to forget that the '05 GT has a 5 speed automatic with a very tall 1st gear, 3.23 vs the 2.84 1st gear in the old 4 speed auto.
Also the OD ratio for the automatic is .71 vs .62 for the manual.
I strongly recommend that you go with 3.90 or 3.73 gears.
3.90s in an 05 auto will act like 4.20 gears in a 04 auto.
3.73s in an 05 auto will act like 4.00 gears in a 04 auto.
And that's not even including the effect of the extra HP and torque that the 05 has over the 04.
Everyone seems to forget that the '05 GT has a 5 speed automatic with a very tall 1st gear, 3.23 vs the 2.84 1st gear in the old 4 speed auto.
Also the OD ratio for the automatic is .71 vs .62 for the manual.
I strongly recommend that you go with 3.90 or 3.73 gears.
3.90s in an 05 auto will act like 4.20 gears in a 04 auto.
3.73s in an 05 auto will act like 4.00 gears in a 04 auto.
And that's not even including the effect of the extra HP and torque that the 05 has over the 04.
#10
Originally posted by V10@February 2, 2005, 7:53 PM
4.10s are way more gear than you need with an automatic.
Everyone seems to forget that the '05 GT has a 5 speed automatic with a very tall 1st gear, 3.23 vs the 2.84 1st gear in the old 4 speed auto.
Also the OD ratio for the automatic is .71 vs .62 for the manual.
I strongly recommend that you go with 3.90 or 3.73 gears.
3.90s in an 05 auto will act like 4.20 gears in a 04 auto.
3.73s in an 05 auto will act like 4.00 gears in a 04 auto.
And that's not even including the effect of the extra HP and torque that the 05 has over the 04.
4.10s are way more gear than you need with an automatic.
Everyone seems to forget that the '05 GT has a 5 speed automatic with a very tall 1st gear, 3.23 vs the 2.84 1st gear in the old 4 speed auto.
Also the OD ratio for the automatic is .71 vs .62 for the manual.
I strongly recommend that you go with 3.90 or 3.73 gears.
3.90s in an 05 auto will act like 4.20 gears in a 04 auto.
3.73s in an 05 auto will act like 4.00 gears in a 04 auto.
And that's not even including the effect of the extra HP and torque that the 05 has over the 04.
#11
4.10's have been perfect for me. I get 22 mpg at 80 mph cruising for over 75 miles. They pull hard and get lots of pwoer to the ground. Anything higher (3.90, 3.73) you will kick yourself.
I cant speak on 4.30 gears. I will say I had 4.56 gears at one time in a 65 mustang - it was way too much for the 3 speed auto.
-Bryan
I cant speak on 4.30 gears. I will say I had 4.56 gears at one time in a 65 mustang - it was way too much for the 3 speed auto.
-Bryan
#12
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So you think getting 3.73 gears for an automatic 05 GT would be a mistake?
At 70 mph, what does your RPM read?
I already have an SCT Excalibrator (I think we've bumped into each other on SCT forums ).
SCT's ExtremeTune software allows us to change axle settings but I heard sombody mention that you have to also change shift points for automatics. That doesn't make sense to me because the automatic shifting has nothing to do with axle ratios.
At 70 mph, what does your RPM read?
I already have an SCT Excalibrator (I think we've bumped into each other on SCT forums ).
SCT's ExtremeTune software allows us to change axle settings but I heard sombody mention that you have to also change shift points for automatics. That doesn't make sense to me because the automatic shifting has nothing to do with axle ratios.
#14
Originally posted by slegos888@February 6, 2005, 10:40 PM
if you dont do highway driving get 4.30's if you do drive on the highway id go with 4.10's or 3.73's if you are a wuss lol
if you dont do highway driving get 4.30's if you do drive on the highway id go with 4.10's or 3.73's if you are a wuss lol
I am interested in 05 but only 3.55 is offered. Would anyone know how much rpm I'm giving up at 65? I understand the 17" wheels would help a bit? Is it possible to get lower ratio from Ford? I do 450 mile cruises often to my home town and would think running at the higher ratio would be detrimental to the engine over the long run, not to mention fuel economy. Is this true?
Any comments on this would help my decision..
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